Table 3.

Mean Time Ratios and 95% CI for Time to Receipt of ADT From Multivariate Accelerated Failure Time Model—SEER-Medicare, 1991–1999

	Ratio of Time to Receipt (95% CI)
Characteristics	Orchiectomy vs. No ADT	LHRH vs. No ADT	LHRH vs. Orchiectomy
Race
White	1.00	1.00	1.00
African American	1.50 (1.03, 2.17)	1.42 (1.06, 1.89)	1.19 (0.97, 1.45)
Age (years)
65–69	1.00	1.00	1.00
70–74	0.52 (0.34, 0.79)	0.80 (0.61, 1.05)	0.95 (0.78, 1.15)
75–79	0.23 (0.15, 0.35)	0.54 (0.40, 0.73)	0.78 (0.64, 0.96)
80+	0.13 (0.09, 0.20)	0.47 (0.34, 0.64)	0.82 (0.67, 1.01)
Marital status
Married	1.00	1.00	1.00
Unmarried	0.83 (0.61, 1.13)	1.01 (0.80, 1.28)	0.94 (0.80, 1.10)
Diagnosis year
1991	0.07 (0.03, 0.16)	2.78 (1.75, 4.41)	3.74 (2.73, 5.14)
1992	0.11 (0.05, 0.24)	1.89 (1.25, 2.88)	2.57 (1.93, 3.43)
1993	0.13 (0.06, 0.29)	1.44 (0.93, 2.22)	1.91 (1.41, 2.59)
1994	0.13 (0.05, 0.29)	1.28 (0.81, 2.04)	1.62 (1.18, 2.23)
1995	0.17 (0.07, 0.39)	1.17 (0.74, 1.85)	1.25 (0.91, 1.72)
1996	0.30 (0.12, 0.76)	1.38 (0.85, 2.25)	1.03 (0.73, 1.47)
1997	0.23 (0.09, 0.59)	0.69 (0.43, 1.12)	0.88 (0.63, 1.23)
1998	1.42 (0.55, 3.70)	1.64 (1.04, 2.60)	1.03 (0.74, 1.45)
1999	1.00	1.00	1.00
SEER site
Atlanta	1.20 (0.66, 2.19)	0.79 (0.50, 1.25)	0.78 (0.57, 1.07)
Detroit	2.18 (1.38, 3.43)	1.43 (1.00, 2.04)	0.99 (0.78, 1.26)
Connecticut	0.76 (0.46, 1.25)	0.49 (0.34, 0.71)	0.58 (0.45, 0.74)
Los Angeles	1.17 (0.69, 1.99)	0.74 (0.51, 1.08)	0.66 (0.51, 0.85)
San Francisco	1.26 (0.74, 2.14)	0.82 (0.54, 1.24)	0.73 (0.55, 0.97)
San Jose	1.47 (0.74, 2.89)	0.94 (0.55, 1.61)	0.98 (0.69, 1.39)
Seattle-Puget Sound	1.00	1.00	1.00
Histologic grade
Well differentiated	1.00	1.00	1.00
Moderately differentiated	0.76 (0.36, 1.64)	1.08 (0.62, 1.88)	1.17 (0.79, 1.73)
Poorly differentiated	0.26 (0.12, 0.54)	0.48 (0.28, 0.83)	0.91 (0.62, 1.34)
Comorbidity score
0	1.00	1.00	1.00
1	0.66 (0.46, 0.94)	0.97 (0.73, 1.29)	1.03 (0.85, 1.24)
2	0.71 (0.40, 1.27)	0.72 (0.47, 1.11)	0.79 (0.60, 1.06)
3+	0.73 (0.38, 1.40)	1.06 (0.62, 1.80)	0.82 (0.56, 1.20)